William caklton



WILLIAM GA RLTON, O F DILNKIRK, NEW YORK. I Letters Patent No. 63,015, dated .March 19, 1867.

IMPROVEll/[ElSl-'Iv IN HEADvBLOGKS POR SAW-MILLS.

....QQ- n TO ALL WHOM IT MAY CONCERN;

Be it known that I, WILLIAM CARLTON, of Dunkirk, in the count-y of Chautauqua, and State of New York, have invented a new and improved Head-Block for Saw-Mills; and I do hereby declare that the following is o. full, clear, antlexact description thereof, which will 'enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part-of this specification, in which- Figure 1 is a side view et' my invention partly in section.

Figure 2, plan or top view of the same partly in section.

Figure-3, a. transverse vertical section of'` the same, taken in th;` liner x, igs. I and 2.

Similarfletters of reference indicate like parts.

This invention relate's'to anew and improved head-block for saw-mills, and it consists in the means employed for adjusting the knees or standards against which the log to be sawed bears, and by which kmeans the log is set to the saw. y

A? represents ahead-block, which is attached to a log-carriage in the usual way, to wit, secured transversely uponl it. This head-block is `hollow or constructed like a box, and has a sleeve, B, fitted transversely in it, through which a shaft, C, passes and is allowed to turn freely, said shaft being turned by means of a crank, D, at the outer side o` .the head-block.

On the shaft C, within the head-block, there is keyed a bevel-wheel, D2", into which a similar wheel, E, gears, thc later being at the front end of a screw, F, placed longitudinally within the head-block, and having its front bearing in the sleeve D, the rear bearing being in a lever, G, one end of which passes through a vertical slot, a., in the side ot' the hcad-block,and is retained in position by a hook, b. l

II represents the knee or standard, against which the log to be sawed is secured by a dog, I, said dog beingattached by a hook connection to a lever, J, secured upon the upper surface of a. slide, K, to which the knee or standard II is secured at one end. This slide has a rack, L, at its under side, into which the szrcw F gears, as shown clearly in fig. 1.

To the side of the head-block, over which the crank- D works, there is attached a. circula-r plate, M, having holes, e, made in it near its periphery, atfequal distances apart, to receive a pin,'d, on the crank D. This plate M is concentric with thc shaft C, and four holes, 1:, are mtrldc in it to securethe crank D at each quarter turn or revolution, if desired. v

From the above description it will be-seen that by turning the shaft C the screw F will be rotated. through the medium of the bevel gears D* E, and the screw, in consequence of gearing into the rack- L at the under side of the slide K, will lnovevthe standard or knee II. and set the log to the saw, the log being movedat different distances, according to the thickness of the stuff to be sawel, by turning the crank D a quarter, half', three-quarters, or a complete revolution, as may be required. l

In (logging the log to the knee or standard, the lever J is raised, the outer end of the dog driven.in the log, and the lever J pressed down and secured by a fastening, N, arranged in any proper way.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent- The gear which operates'thc knee of a head-block, consisting of the bevel-wheels D* E, worm F, rackL, sleeve I3, and lever Gr, arranged and operating substantially as described for the purpose specified.

WILLIAM CARLTON.

Witnesses:

THOMAS HARPER, Havnv Sem-LING. 

